Change in proceeds of sales of investments available for sale receivable in period Noncash Investing and Financing Activities, Change in Proceeds of Sales of Investments Noncash Investing and Financing Activities, Change in Proceeds of Sales of Investments Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Cash paid for: Supplemental Cash Flow Information [Abstract] LTV 60% to 75% LTV 60 to 75 Percent [Member] Loan-to-value (LTV) ratio from 60 to 75%. Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Revenue Recognition, Other Revenue Recognition, Other, Policy [Policy Text Block] Revenue Recognition, Other, Policy FIA/ IUL embedded derivatives, included in contractholder funds Fixed Annuity, IUL Embedded Derivatives Liabilities in Contract Holder Funds [Member] Fixed Annuity, IUL Embedded Derivatives Liabilities in Contract Holder Funds Mortality multiplier Fair Value Inputs Mortality Multiplier Fair Value Inputs Mortality Multiplier Greater than 1.25 Greater than 1.25x Greater Than One Point Two Five [Member] Greater Than One Point Two Five [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Derivative liability Derivative Liability Dividends declared, per common share Dividends, Common Stock, Cash Security Exchange Name Security Exchange Name Direct Direct Premiums Earned Securities, at fair value Equity and preferred securities Equity Securities, FV-NI, Current Unrealized loss on foreign currency translation, tax benefit (less than $1 million) Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Information about Trade Receivables and Deferred Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Payment of contingent consideration for prior period acquisitions Payment for Contingent Consideration Liability, Financing Activities Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Gain on sales of investments and other assets and asset impairments, net Gain (Loss) on Investments and Disposition of Other Assets Gain (Loss) on Investments and Disposition of Other Assets Black Scholes model Black Scholes Model [Member] Black Scholes Model [Member] Thereafter Present Value of Future Insurance Profits, Expected Amortization, After Year Five Present Value of Future Insurance Profits, Expected Amortization, After Year Five Income-Approach Valuation, Income Approach [Member] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net change in income taxes Increase (Decrease) in Income Taxes Payable Liabilities, Total Gains (Losses) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Commercial mortgage loans Commercial Mortgage Loans [Member] Commercial Mortgage Loans Financing Receivable Credit Quality Indicator Current Year Abstract [Abstract] Financing Receivable Credit Quality Indicator Current Year Abstract [Abstract] Financing Receivable Credit Quality Indicator Current Year Abstract Balance at beginning of period Balance at end of period Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net Kubera Reassurance Company Kubera Reassurance Company [Member] Kubera Reassurance Company [Member] [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Antidilutive securities excluded from computation of EPS, less than (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Revenue recognized Contract with Customer, Liability, Revenue Recognized Commercial mortgage loans, percentage of investments Commercial Mortgage Loans, Percentage of Investments Commercial Mortgage Loans, Percentage of Investments East South Central East South Central [Member] East South Central [Member] Secured trust deposits Contract With Customer, Liability, Customer Deposits Contract With Customer, Liability, Customer Deposits Reinsurance recoverable, net of allowance for credit losses of $20 at March 31, 2022 and December 31, 2021 Reinsurance Recoverables, Including Reinsurance Premium Paid Market value of option Fair Value Inputs Market Value Of Option Fair value inputs market value of option. 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General Industrial, General [Member] Industrial, General [Member] DSC ratio, amortization period Debt Service Coverage Ratio, Amortization Period Debt Service Coverage Ratio, Amortization Period Fair Value Measurement [Domain] Fair Value Measurement [Domain] Diluted Earnings Per Share, Diluted [Abstract] Amortized cost of loans on non-accrual Amortized Cost of Non-Accrual Loans [Abstract] Amortized Cost of Non-Accrual Loans Schedule of Investments [Table] Schedule of Investments [Table] Total asset derivatives Fair Value Derivative Asset, Fair Value, Gross Asset Futures contracts Future [Member] Adjustment for net unrealized investment (gains) losses Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Unrealized Gain (Loss) on Investment Assets Assets, Fair Value Disclosure [Abstract] Mixed Use Warehouse [Member] Outstanding debt Long-term Debt Distributions from unconsolidated affiliates, return of investment Proceeds from Equity Method Investment, Distribution, Return of Capital Ceded Credit Risk [Line Items] Ceded Credit Risk [Line Items] Deferred sales inducements Deferred Sales Inducements, Paid Deferred Sales Inducements, Paid Level 1 Fair Value, Inputs, Level 1 [Member] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Change in future policy benefits Increase (Decrease) in Future Policy Benefit Reserves Interest and investment income, including recognized gains and losses, net Net Investment Income, And Gain (Loss) On Investments Net Investment Income, And Gain (Loss) On Investments Direct title insurance premiums Direct Premiums Written Entity Small Business Entity Small Business Cash and Cash Equivalents Cash and Cash Equivalents [Member] Allowance for Expected Credit Losses on Loans Financing Receivable, Allowance for Credit Loss [Table Text Block] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Trade receivables Accounts Receivable, after Allowance for Credit Loss Pending Litigation Pending Litigation [Member] Decrease in statutory capital and surplus Statutory Accounting Practices, Statutory Capital and Surplus, Increase (Decrease) as a Result of ReDomestication by Entity Statutory Accounting Practices, Statutory Capital and Surplus, Increase (Decrease) as a Result of ReDomestication by Entity EBITDA multiple EBITDA Multiple [Member] EBITDA Multiple Schedule of Sources of Net Investment Income Reported Schedule of Sources of Net Investment Income Reported [Table Text Block] Schedule of Sources of Net Investment Income Reported Scenario [Axis] Scenario [Axis] Hotel Hotel [Member] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Pacific Pacific US [Member] Pacific US [Member] Liabilities, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Entity Interactive Data Current Entity Interactive Data Current Available-for-sale securities Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Gross gains Debt Securities, Available-for-sale, Realized Gain Insurance Subsidiary Affiliated Entity [Member] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman [Member] Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Entity Address, State or Province Entity Address, State or Province Plaintiffs claim losses amount Loss Contingency, Damages Sought, Value Change in statutory capital surplus increase (decrease) Statutory Accounting Practices, Permitted Practice, Change in Statutory Capital and Surplus Statutory Accounting Practices, Permitted Practice, Change in Statutory Capital and Surplus Non-performing Nonperforming Financial Instruments [Member] Equity securities Equity securities Equity Securities [Member] Foreign Governments Debt Security, Government, Non-US [Member] Escrow fees Escrow Fees [Member] Escrow Fees [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Lease liabilities Operating Lease, Liability Document Transition Report Document Transition Report Call options Call Option [Member] FNF common stock, $0.0001 par value; authorized 600,000,000 shares as of March 31, 2022 and December 31, 2021; outstanding of 281,117,483 and 283,778,574 as of March 31, 2022 and December 31, 2021, respectively, and issued of 325,573,748 and 325,486,429 as of March 31, 2022 and December 31, 2021, respectively Common Stock, Value, Issued Debt-to-Value [Axis] Debt-to-Value [Axis] Commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] DSI DSI [Member] DSI Other securities which provide for periodic payments, Fair Value Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Other Commitments [Table] Other Commitments [Table] Ownership [Axis] Ownership [Axis] Legal Entity [Axis] Legal Entity [Axis] Traditional Life Insurance Premiums Life Insurance Product Line [Member] Total fixed maturities Fixed Maturities [Member] Class of Stock [Axis] Class of Stock [Axis] Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Derivative investments Derivative Instruments [Member] Derivative Instruments [Member] Aggregate consideration received Sale of Stock, Consideration Received on Transaction Liabilities, Net transfer In (Out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Real estate technology Real Estate Technology [Member] Real Estate Technology [Member] Reserve for title claim losses Liability for Unpaid Claims and Claims Adjustment Expense, Net Changes in Fair Value of Financial Instruments - Assets Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Entity [Domain] Entity [Domain] Cash dividend per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Revenue from contract with customer Revenue from Contract with Customer, Excluding Assessed Tax Other assets Other Asset Commitments [Member] Other Asset Commitments Credit Suisse Credit Suisse [Member] Credit Suisse Change in NAV of limited partnerships, net Limited Partnerships, Unrealized Gain (Loss), net, NAV Limited Partnerships, Unrealized Gain (Loss), net, NAV Funds withheld for reinsurance liabilities Funds Held under Reinsurance Agreements, Liability Consolidation Items [Domain] Consolidation Items [Domain] Equity [Abstract] Equity [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Document Quarterly Report Document Quarterly Report Barclay's Bank Barclays Bank [Member] Barclay's Bank. Measurement Input Type [Domain] Measurement Input Type [Domain] Fair Values, Less than 12 months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Realized gains on certain derivative instruments Gain (Loss) on Sale of Derivatives Segment Information Segment Reporting Disclosure [Text Block] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Tax deferred property exchange income Tax Deferred Property Exchange [Member] Tax Deferred Property Exchange Carrying Value Investments Owned, VIE, Unconsolidated, Carrying Value Investments Owned, VIE, Unconsolidated, Carrying Value Additional Paid-in Capital Additional Paid-in Capital [Member] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Net increase in reserve for title claim losses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Life insurance premiums, insurance and investment product fees, and other Life Insurance Premiums, Insurance and Investment Product Fees, Other [Member] Life Insurance Premiums, Insurance and Investment Product Fees, Other Mortgage loans, net of allowance for credit losses of $32 and $31 at March 31, 2022 and December 31, 2021, respectively Total mortgage loans Financing Receivable, after Allowance for Credit Loss Greater than 1.00 Greater Than One Point Zero Zero [Member] Greater Than One Point Zero Zero Reinsurance related embedded derivative, included in other assets Embedded Derivatives Assets in Reinsurance Contracts [Member] Embedded Derivatives Assets in Reinsurance Contracts 1.00 - 1.25 1.00x - 1.25x Greater Than One But Less Than One Point Two Five [Member] Greater Than One But Less Than One Point Two Five [Member] Net other investing activities Payments for (Proceeds from) Other Investing Activities Maximum Maximum [Member] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Total Fidelity National Financial, Inc. shareholders’ equity Stockholders' Equity Attributable to Parent City Area Code City Area Code Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Ceded Ceded Premiums Earned Option cost Fair Value Input Option Cost Fair Value Input Option Cost Schedule of Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Earnings before equity in earnings of unconsolidated affiliates Income (Loss) From Continuing Operations Before Minority Interest And Income (Loss) On Equity Method Investments, Net Of Income Tax Income (Loss) From Continuing Operations Before Minority Interest And Income (Loss) On Equity Method Investments, Net Of Income Tax Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Purchases of treasury stock Payments for Repurchase of Common Stock Wakefield Capital, LLC, Wakefield Investments, LLC, 2Budz Holding, LLC, Doug and Kristine Heidrich, and Jeff and Heidi Orr v. Chicago Title Co. and Chicago Title Ins. Co. Wakefield Capital, LLC, Wakefield Investments, LLC, 2Budz Holding, LLC, Doug and Kristine Heidrich, and Jeff and Heidi Orr v. Chicago Title Co. and Chicago Title Ins. Co. [Member] Wakefield Capital, LLC, Wakefield Investments, LLC, 2Budz Holding, LLC, Doug and Kristine Heidrich, and Jeff and Heidi Orr v. Chicago Title Co. and Chicago Title Ins. Co. Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Equity: Stockholders' Equity Attributable to Parent [Abstract] Trade and notes receivables, net of allowance of $32 at March 31, 2022 and December 31, 2021 Trade and notes receivables, net of allowance Accounts and Financing Receivable, after Allowance for Credit Loss Derivatives: Derivative Asset [Abstract] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Operating Segments Operating Segments [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Business Acquisition [Line Items] Business Acquisition [Line Items] Discounted cash flow Valuation Technique, Discounted Cash Flow [Member] Income Statement [Abstract] Income Statement [Abstract] Investments in unconsolidated affiliates Equity Method Investments Entity Registrant Name Entity Registrant Name Asset Class [Domain] Asset Class [Domain] Prepaid expenses and other assets Prepaid Expense and Other Assets Deferred policy acquisition costs and deferred sales inducements Increase (Decrease) in Deferred Policy Acquisition Costs and Deferred Sales Inducements Increase (Decrease) in Deferred Policy Acquisition Costs and Deferred Sales Inducements Earnings per share Net Income Loss Per Common Share Attributable To Controlling Interest [Abstract] Net income (loss) per common share attributable to controlling interest. Income tax expense Income tax expense (benefit) Income Tax Expense (Benefit) Other Commitments [Domain] Other Commitments [Domain] Insurance [Abstract] Insurance [Abstract] Entity Tax Identification Number Entity Tax Identification Number Investment Type [Axis] Investment Type [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Offered quotes Fair Value Inputs Quoted Prices Fair Value Inputs Quoted Prices Other long-term investments Other Assets, Fair Value Disclosure Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Fixed maturity securities, ABS Fixed Maturity Securities, Asset Backed Securities [Member] Fixed Maturity Securities, Asset Backed Securities Residential mortgage loans Other Invested Assets [Member] Other Invested Assets [Member] Broker-quoted Valuation, Market Approach [Member] Equity Component [Domain] Equity Component [Domain] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Truist Truist [Member] Truist Residential mortgage loans, location percentage Residential Mortgage Loans, Location Percentage Residential Mortgage Loans, Location Percentage Litigation Case [Axis] Litigation Case [Axis] Unfunded investment commitment Other Commitment Liabilities: Liabilities [Abstract] Short term investments Short-term Investments [Member] Counterparty Name [Domain] Counterparty Name [Domain] Weighted Average Weighted Average [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Total expenses Benefits, Losses and Expenses Investment in affiliate FEG Investment [Member] FEG Investment Dividend Yield Measurement Input, Expected Dividend Rate [Member] Change in fair value of reinsurance related embedded derivatives Change in fair value of derivatives Derivative, Gain (Loss) on Derivative, Net Total Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Segment Reporting [Abstract] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Other Other Property [Member] Amortized Cost Total fixed maturity available-for-sale securities, Fair Value Debt Securities, Available-for-sale, Amortized Cost Change in funds withheld from reinsurers Increase (Decrease) in Reinsurance Payables 2022 Present Value of Future Insurance Profits, Expected Amortization, Remainder of Fiscal Year Contractholder funds Contract Holder Funds [Member] Fixed indexed annuities Fixed Index Annuity [Member] Fixed index annuity. Maximum amount of loss due to credit risk Derivative Asset, Fair Value, Amount Offset Against Collateral Premiums and other considerations: Premiums Earned, Net [Abstract] Title of 12(b) Security Title of 12(b) Security Other securities which provide for periodic payments, Amortized Cost Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Common stock, shares authorized (in shares) Common Stock, Shares Authorized Limited partnerships Limited Partnership [Member] Limited Partnership [Member] Corporates, Non-structured Hybrids, Municipal and Government securities: Corporates, Non-structured Hybrids, Municipal and Government securities: [Member] Corporates, Non-structured Hybrids, Municipal and Government Securities Other long-term investments Other Long-term Investments Subtotal, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Document Type Document Type Credit linked note Credit Linked Note [Member] Credit Linked Note [Member] Product and Service [Domain] Product and Service [Domain] Summary of the Reserve for Claim Losses Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Investment in affiliate Investment in Affiliate, Measurement Input Investment in Affiliate, Measurement Input Gross investment income Gross Investment Income, Operating Less: Net earnings attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Equity Method Investment, Nonconsolidated Investee or Group of Investees Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Reclassification adjustments for change in unrealized gains and losses included in net earnings Reclassification adjustments for change in unrealized gains and losses included in net earnings Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Real Estate [Domain] Real Estate [Domain] Mountain Mountain [Member] Mountain [Member] Geographical [Axis] Geographical [Axis] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Term of contract, term two Derivative, Term of Contract, Term Two Derivative, Term of Contract, Term Two Other investments Other Investments [Member] Charges assessed to contractholders for mortality and admin Charges Assessed To Contract Holders For Mortality And Administration Mortality and expense charges and administrative fees. Funds withheld co-insurance basis, percentage Funds Withheld Co-Insurance Basis, Percentage Funds Withheld Co-Insurance Basis, Percentage Total financial liabilities at fair value Financial Liabilities Fair Value Disclosure Limited Partnerships Limited Partnerships [Member] Limited Partnerships Change in valuation of derivatives, equity and preferred securities, net Unrealized Gain (Loss) on Investments For initial credit losses on purchased securities accounted for as PCD financial assets Debt Securities, Available-for-sale, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Less: Treasury stock, 44,456,265 shares and 41,707,855 shares as of March 31, 2022 and December 31, 2021, respectively, at cost Treasury Stock, Value Equity in earnings of unconsolidated affiliates Equity in earnings (loss) of unconsolidated affiliates Income (Loss) from Equity Method Investments Other operating expenses Other Cost and Expense, Operating Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Structured hybrids Structured Hybrids [Member] Structured hybrids. 2024 Present Value of Future Insurance Profits, Expected Amortization, Year Two Commercial mortgage loans Investments, Commercial Mortgage Loans, Fair Value Disclosure Fair value of the investment commercial mortgage loan portfolio Interest Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization Expense, Accrued Interest Available-for-sale Securities Available-for-sale Securities [Member] Other embedded derivatives Embedded derivatives Embedded Derivative Financial Instruments [Member] Derivative [Table] Derivative [Table] Revenues: Revenues [Abstract] Document Period End Date Document Period End Date Provision for title insurance claim losses as a percentage of title insurance premiums Provision For Title Insurance Claims on Current Year Policies Provision For Title Insurance Claims on Current Year Policies Kim Funding, LLC, Kim H. Peterson, Joseph J. Cohen, and ABC Funding Strategies, LLC v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Kim Funding, LLC, Kim H. Peterson, Joseph J. Cohen, and ABC Funding Strategies, LLC v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman [Member] Kim Funding, LLC, Kim H. Peterson, Joseph J. Cohen, and ABC Funding Strategies, LLC v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Dividend to shareholders, pro rata percentage of common stock Dividend to Shareholders, Pro Rata Percentage of Common Stock Dividend to Shareholders, Pro Rata Percentage of Common Stock Other comprehensive loss - unrealized loss on investments and other financial instruments OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Unrealized gain on investments in unconsolidated affiliates Other comprehensive earnings - unrealized gain on investments in unconsolidated affiliates Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) On Equity Method Investments Arising During Period, Net Of Tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) On Equity Method Investments Arising During Period, Net Of Tax Direct Policyholder Benefits and Claims Incurred, Direct Change in allowance for expected credit losses Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) Investments Investment [Text Block] Income Statement Location [Domain] Income Statement Location [Domain] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Interest and investment income Interest and investment income Net Investment Income Unlocking Deferred Policy Acquisition Costs and Present Value of Future Profits, Unlocking Adjustment Deferred Policy Acquisition Costs and Present Value of Future Profits, Unlocking Adjustment Accrued interest receivable Interest Receivable Property and equipment, net Property, Plant and Equipment, Net Number of Board of Directors on the litigation committee Number of Board of Directors Number of Board of Directors Estimated Amortization Expense for VOBA in Future Fiscal Periods Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Assets, Total Gains (Losses) Included in AOCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Current (less than 30 days past due) Financial Asset, 1 to 29 Days Past Due [Member] Realized losses on other invested assets Gain (Loss) on Sale of Other Investments Total revenues Revenues Non-performance spread Fair Value Inputs Non Performance Spread Fair Value Inputs Non Performance Spread Net earnings per share from discontinued operations attributable to common shareholders (in usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Other Commitments [Line Items] Other Commitments [Line Items] Wilton Reassurance Company Wilton Reassurance Company [Member] Wilton reassurance company. Expenses: Costs and Expenses [Abstract] Total number of available-for-sale securities in an unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Entity Current Reporting Status Entity Current Reporting Status Title premiums Premiums Written, Net Revenue Recognition, Services, Real Estate Transactions Revenue Recognition, Services, Real Estate Real Estate Transactions [Policy Text Block] Revenue Recognition, Services, Real Estate Real Estate Transactions For securities intended/required to be sold prior to recovery of amortized cost basis Debt Securities, Available-for-sale, Allowance for Credit Loss, Sell before Recovery Commitment to Invest Commitment to Invest [Member] Commitment to Invest [Member] Counterparty Name [Axis] Counterparty Name [Axis] Beginning balance (in shares) Ending balance (in shares) Shares, Issued Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] United States UNITED STATES Discount rate Measurement Input, Discount Rate [Member] Investment owned, (in shares) Investment Owned, Balance, Shares Third-Party Valuation Third Party Valuation Technique [Member] Third Party Valuation Technique [Member] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Beginning balance Ending balance of claim loss reserve for title insurance Liability for Claims and Claims Adjustment Expense Entity Address, Postal Zip Code Entity Address, Postal Zip Code Revenues from external customers Insurance Services Revenue Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Collections of notes receivable Proceeds from Collection of Notes Receivable Related Party [Domain] Related Party [Domain] Direct title insurance premiums Insurance Contracts, Direct Title Insurance Premiums [Member] Insurance Contracts, Direct Title Insurance Premiums [Member] Financing Receivable, Nonaccrual Financing Receivable, Nonaccrual [Table Text Block] Allowance for expected loan loss, percent Financing Receivable Allowance for Expected Credit Loss, Percent Financing Receivable Allowance for Expected Credit Loss, Percent Write-offs charged against the allowance Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff Total title claim loss provision Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Ceded Credit Risk [Table] Ceded Credit Risk [Table] Investment expense Investment Income, Investment Expense Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Loan subservicing revenue Fees and Commissions, Mortgage Banking and Servicing Maximum Loss Exposure Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Short-term investments, at March 31, 2022 and December 31, 2021 includes pledged short-term investments of $1 related to secured trust deposits Other Short-term Investments Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Total mortgage loans Total Mortgage Loans [Member] Total Mortgage Loans [Member] Entity Address, Address Line One Entity Address, Address Line One Benefits and Other Changes in Insurance Policy Reserves: Policyholder Benefits and Claims Incurred [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Entity Shell Company Entity Shell Company CalPrivate Bank v. Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 CalPrivate Bank v. Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 [Member] CalPrivate Bank v. Kim H. Peterson Trustee of the Peterson Family Trust dated April 14 1992 Agency title insurance premiums Assumed Premiums Written Litigation Status [Domain] Litigation Status [Domain] Ceded Policyholder Benefits and Claims Incurred, Ceded Schedule of Investment in Mortgage Loans by Loan to Value and Debt Service Coverage Ratios Schedule of Investment in Mortgage Loans by Loan to Value and Debt Service Coverage Ratios [Table Text Block] Tabular disclosure of investments in loans separated by loan to value (LTV) and debt service coverage ratios (DSCR). Foreign currency forwards Foreign Exchange Forward [Member] Loss Contingencies [Table] Loss Contingencies [Table] Exposure to Credit Loss on Call Options Held Schedule Of Exposure To Credit Loss On Derivative Instrument Table [Table Text Block] Schedule of exposure to credit loss on derivative instrument. 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Chicago Title Co., Chicago Title Ins. Co. et al Susan Heller Fenley Separate Property Trust, Susan Heller Fenley Inherited Roth IRA, Shelley Lynn Tarditi Trust and ROJ, LLC v. Chicago Title Co., Chicago Title Ins. Co., [Member] Susan Heller Fenley Separate Property Trust, Susan Heller Fenley Inherited Roth IRA, Shelley Lynn Tarditi Trust and ROJ, LLC v. Chicago Title Co., Chicago Title Ins. 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Non-controlling Interest Noncontrolling Interest [Member] Canada Life Assurance Company, US Canada Life Assurance Company, US [Member] Canada Life Assurance Company, US Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Schedule of Distribution of CMLs, Gross Valuation by Property Type and Geographic Region Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Deferred sales inducement, unrealized investment gains Deferred Sales Inducement Cost, Unrealized Gain (Loss) on Investment Derivative Contract [Domain] Derivative Contract [Domain] Net Premiums Earned, Net Term of contract, term four Derivative, Term of Contract, Term Four Derivative, Term of Contract, Term Four Residential mortgage-backed securities Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Accounts payable and accrued liabilities: Accounts Payable and Accrued Liabilities [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Litigation Status [Axis] Litigation Status [Axis] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Percentage of total investments Residential Mortgage Receivable, Percentage of Total Percentage of the total residential loan portfolio Subsequent Event [Line Items] Subsequent Event [Line Items] Basic Earnings Per Share, Basic [Abstract] Net Policyholder Benefits and Claims Incurred, Net Corporate and Other Corporate and Other [Member] Residential mortgage loans Residential mortgages Residential Mortgage Residential Portfolio Segment [Member] Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Net earnings per share attributable to common shareholders, diluted (in usd per share) Earnings Per Share, Diluted New York NEW YORK Segments [Domain] Segments [Domain] % of Total Financing Receivable, before Allowance for Credit Loss, to Total, Percent Income taxes Income Taxes Paid, Net Interest accrual rate utilized to calculate accretion of interest Value of Business Acquired, Assumption, Interest Rate to Calculate Accretion on Intangible Asset Value of Business Acquired, Assumption, Interest Rate to Calculate Accretion on Intangible Asset Whole loans Whole Loans [Member] Whole Loans Municipals Municipals [Member] Municipals. Equity in earnings of unconsolidated affiliates Income (Loss) from Equity Method Investments, Excluding Discontinued Operations Income (Loss) from Equity Method Investments, Excluding Discontinued Operations Activity in Allowance for Credit Loses of Available-for-sale Securities Aggregated by Investment Category Debt Securities, Available-for-sale, Allowance for Credit Loss [Table Text Block] Equity securities Equity Securities, FV-NI, Measurement Input New Jersey NEW JERSEY Subsidiary dividends paid to non-controlling interest shareholders Payments of Ordinary Dividends, Noncontrolling Interest Comprehensive (loss) earnings attributable to Fidelity National Financial, Inc. common shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Allowance % of Total Financing Receivable, Allowance for Credit Loss to Outstanding, Percent Deferred revenue (contract liabilities) Contract with Customer, Liability LTV Less Than 50 % LTV Less Than 50 Percent [Member] Loan-to-value (LTV) ratio less than 50%. Other comprehensive (loss) earnings: Other Comprehensive Income (Loss), Net of Tax [Abstract] CalPrivate Bank v. Chicago Title Co. and Chicago Title Ins. Co. CalPrivate Bank v. Chicago Title Co. and Chicago Title Ins. Co. [Member] CalPrivate Bank v. Chicago Title Co. and Chicago Title Ins. Co. Deferred tax liability Deferred Income Tax Liabilities, Net Pennsylvania PENNSYLVANIA Collateral held Collateral Already Posted, Aggregate Fair Value Banc of California, National Association v. Laurie Peterson Banc of California, National Association v. Laurie Peterson [Member] Banc of California, National Association v. Laurie Peterson Net earnings per share from continuing operations attributable to common shareholders (in usd per share) Income (Loss) from Continuing Operations, Per Basic Share Net earnings from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Corporates Corporate Debt Securities [Member] Term of contract, term one Derivative, Term of Contract, Term One Derivative, Term of Contract, Term One 2022 2021 Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Laurie Peterson v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman Laurie Peterson v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman, [Member] Laurie Peterson v. Chicago Title Co., Chicago Title Ins. Co., Thomas Schwiebert, Adelle Ducharme, and Betty Elixman, Matter of FGL Holdings Matter of FGL Holdings [Member] Matter of FGL Holdings Depreciation and amortization Depreciation, Depletion and Amortization Carrying Amount and Estimated Fair Value of Assets and Liabilities on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Accumulated Other Comprehensive Earnings (Loss) AOCI Attributable to Parent [Member] Company-owned life insurance Bank Owned Life Insurance Financing Receivable Credit Quality Indicator Prior Year [Abstract] Financing Receivable Credit Quality Indicator Prior Year [Abstract] Financing Receivable Credit Quality Indicator Prior Year Common stock, shares, outstanding (in shares) Common Stock, Shares, Outstanding Financial Instruments [Domain] Financial Instruments [Domain] Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Morgan Stanley Morgan Stanley [Member] Morgan Stanley. Total number of available-for-sale securities in an unrealized loss position less than twelve months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Entity Central Index Key Entity Central Index Key Texas TEXAS For credit losses on securities for which losses were not previously recorded Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded Investments measured under equity method or NAV expedient Investments Measured Under Equity Method Or Net Asset Value Expedient Investments Measured Under Equity Method Or Net Asset Value Expedient Loans in process of foreclosure Mortgage Loans in Process of Foreclosure, Amount Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Loss Contingencies [Line Items] Loss Contingencies [Line Items] Canadian Imperial Bank of Commerce Canadian Imperial Bank of Commerce [Member] Canadian Imperial Bank of Commerce [Member] Residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Treasury stock repurchased (in shares) Treasury Stock, Shares, Acquired Trading Symbol Trading Symbol Allowance for doubtful accounts, premiums and other receivables Allowance for Doubtful Accounts, Premiums and Other Receivables Derivative investments Derivative Asset Realized gains (losses) on derivatives and embedded derivatives Change In Fair Value Derivatives, Including Other Derivatives Change In Fair Value Derivatives, Including Other Derivatives Total Gross Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Residential mortgage loans Investments, Residential Mortgage Loans, Fair Value Disclosure Fair value of the investment residential mortgage loan portfolio Investment contracts, included in contractholder funds Liabilities Related to Investment Contracts, Fair Value Disclosure Liabilities Liabilities, Fair Value Disclosure [Abstract] Risk Free Rate Measurement Input, Risk Free Interest Rate [Member] Personnel costs Labor and Related Expense Net earnings Net earnings Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Investments [Domain] Investments [Domain] Prior Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Shares issued in exchange (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Available for sale securities, allowance for credit losses Allowance for Expected Credit Losses Balance at Beginning of Period Balance at End of Period Debt Securities, Available-for-sale, Allowance for Credit Loss Net realized (losses) gains on fixed maturity available-for-sale securities Debt Securities, Realized Gain (Loss) Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Surrender rates Fair Value Inputs Surrender Rates Fair Value Inputs Surrender Rates Summary of Changes in Carrying Amounts of Intangible Assets, VOBA and DAC DSI Schedule of Finite-Lived Intangible Assets [Table Text Block] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Balance at Beginning of Period Balance at End of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Estimated litigation liability Estimated Litigation Liability Cannae Holdings Inc. Cannae Holdings Inc. [Member] Cannae Holdings Inc. [Member] Dividends Stockholders' Equity Note Disclosure [Text Block] Measurement Basis [Axis] Measurement Basis [Axis] Reinsurance risk charge fees Reinsurance Risk Charge Fee Reinsurance Risk Charge Fee Additional investments in unconsolidated affiliates Payments to Acquire Equity Method Investments Student Housing Student Housing [Member] Student Housing Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Changes in assets and liabilities, net of effects from acquisitions: Increase (Decrease) in Operating Capital [Abstract] Class of Stock [Domain] Class of Stock [Domain] Summary of Unfunded Commitments Other Commitments [Table Text Block] Merrill Lynch Merrill Lynch [Member] Merrill Lynch [Member] Stock-based compensation APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Fidelity National Financial Inc. Fidelity National Financial Inc. [Member] Fidelity National Financial Inc. Ownership [Domain] Ownership [Domain] 2019 2018 Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year DAC Dac [Member] DAC. 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